Relation of Specific Gravity to Body Build in a Group of Healthy Men

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Abstract
Sp. gr. detns. by underwater weighing, calculation of % body fat, and descriptions of physique by Sheldon''s somato-typing technic were carried out on a group of 81 healthy male subjects selected to include representatives of extremes in body build. Results show that Sheldon''s first component of the soma-totype, i.e., rating of the round, soft aspect of physique, corre-lates inversely with the body sp, gr. An equation is presented which makes it possible to predict the latter with an avg. deviation of 0.007 from the figures actually obtained by immersion. From these predictive values the avg. error for estimation of body fat is only [plus or minus] 3.5%.

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